You should look up benchmarks for the HD 6670 and add maybe 10-20% to it. I'd be sure to take into consideration ridiculously stupid settings like 1680x1050 8x MSAA since a more practical setting like 1920x1080 would make way more sense. Only remind you due to the nature of the card(memory bandwidth for example) and the limited selection of reviews.

I have a lot of games so feel free to throw me some requests and if I have it I'll bench it at your requested settings (up to 1440p @ 60fps).

Of course all that is if you're seriously interested.

If I haven't gotten back to you throw me another PM if you're still interested. I have gotten a lot of ridiculous PMs so it's hard to keep track of everything.

Edit:

Since the introduction of the bump system, while trepidatious, I was under the assumption that posting in threads didn't bump it. If I could get pushed back down that'd be great.